[1]袁养金,戴益民,蒋姝,等.低矮建筑屋面局域风毁所致瞬态内外压特性研究[J].自然灾害学报,2020,29(06):117-128.[doi:10.13577/j.jnd.2020.0612]
 YUAN Yangjin,DAI Yimin,JIANG Shu,et al.Study on the transient internal and external pressure induced by local roof failure of low-rise building[J].,2020,29(06):117-128.[doi:10.13577/j.jnd.2020.0612]
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低矮建筑屋面局域风毁所致瞬态内外压特性研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
29
期数:
2020年06期
页码:
117-128
栏目:
出版日期:
2020-12-28

文章信息/Info

Title:
Study on the transient internal and external pressure induced by local roof failure of low-rise building
作者:
袁养金12 戴益民12 蒋姝12 宋思吉12
1. 结构抗风与振动控制湖南省重点实验室, 湖南 湘潭 411201;
2. 湖南科技大学 土木工程学院, 湖南 湘潭 411201
Author(s):
YUAN Yangjin12 DAI Yimin12 JIANG Shu12 SONG Siji12
1. Hunan Provincial Key Laboratory of Structural Wind and Vibration Control, Xiangtan 411201, China;
2. School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
关键词:
低矮建筑屋面开孔瞬态破坏风洞试验净风压极值
Keywords:
low-rise buildingroof openingtransient damagewind tunnel testextreme net wind pressure
分类号:
TU24;TU;X4;X9
DOI:
10.13577/j.jnd.2020.0612
摘要:
基于缩尺比为1∶40的刚性模型,针对低矮建筑易损区开孔所致风载特性开展风洞试验研究,研究开孔位置影响瞬态风载过冲效应及建筑内外压变化规律。结果表明:不同位置开孔所致屋面内压分布均匀但风压量值不同,且背风面开孔对内压有削弱作用。开孔位置对过冲比分布影响较大,其中背风屋脊开孔所致瞬态内压过冲比最大。易损局域瞬态风毁对屋面外压产生明显的瞬态效应,稳态外压与未开孔屋面外压差异明显。局域风毁所致内外压联合作用的净风压极值系数对内压起控制性作用,尤其是孔口屋檐区、屋面角部和尾部区及背风屋脊区受联合作用更为显著。
Abstract:
Based on a 1:40 reduced scale rigid model, the wind tunnel test was carried out to study the wind load characteristics caused by opening at vulnerable roof areas of low-rise building, and to study the effect of opening location on the overshooting effect of wind load on roof and the variation law of the internal and external pressure. The results show that the internal pressure distributed uniformly the roof but the wind pressure value is different, when the roof opening at different locations. The internal pressure is weakened for leeward roof opening. The opening location has a great influence on the distribution of overshoot ratio, and the transient internal pressure overshoot ratio caused by the opening at the leeward ridge area is the largest. The transient wind damage at vulnerable local roof area has significant transient effect on roof external pressure. There is significant discrepancy between steady-state external pressure and external pressure of no opening roof. In addition, the net wind pressure extreme value coefficient considering coupling effect of internal and external pressure plays a controlling role in internal pressure, and the coupling effect is more significant at the eaves around opening, the corners, tails of the roof and the leeward roof ridge area.

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备注/Memo

备注/Memo:
收稿日期:2020-03-26;改回日期:2020-05-04。
基金项目:国家自然科学基金项目(51578237); 湖南省研究生学位教育改革重点项目(2019JGZD063); 湖南省教育厅科学研究重点项目(19A168)
作者简介:袁养金(1994-),男,硕士研究生,主要从事结构风工程方面的研究.E-mail:2658058913@qq.com
通讯作者:戴益民(1972-),男,教授,博士,主要从事结构抗风方面的研究.E-mail:617275190@qq.com
更新日期/Last Update: 1900-01-01